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Heath Zenith SM 2420 frequency meter
Mondial
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#2

03-07-2014, 11:23 AM
The frequency counter has a minimum signal level requirement and once you go below it, the reading will be unstable or fail to read at all. Not much can be done about it. Just set the freq as best you can and then reduce the attenuator as necessary. Periodically you can increase the signal to confirm that it has not drifted off freq significantly.
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RE: Heath Zenith SM 2420 frequency meter - by Mondial - 03-07-2014, 11:23 AM



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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment